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2 SheetsSheet 1.

(No Model.)

B. SMITH.

AUTOMATIG GUIDE ROLL ATTACHMENT.

No. 362,674. Patented May 10, 1887.

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(No Model.) 2 Sheets-Sheet 2 R. SMITH.

AUTOMATIC GUIDE ROLL ATTACHMENT.

No. 362,674. Patented May 10, 1887.

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A A SMAWT 1 "r STATES PATENT Trice.

RICHARD SMITH, OF SHERBROOKE, QUEBEC, CANADA, ASSIGNOR OF ONE- HALF TOTHE FALL MOUNTAIN PAPER COMPANY, OF BELLOXVS FALLS,

VERMONT.

AUTOMATIC GUIDE-=ROLL ATTACHM ENT.

SPECIFICATION forming part of Letters Patent No. 362,674, dated May 10,1887. I Application filed Drcelnher 6, 1886. Serial No, 220,966. (Nomodel.)

To all whom, it may concern.-

Beit known that I, RICHARD SMITH, a citizen of Canada, residing atSherbrooke, in the county of Sherbrooke and Province of Quebec, Canada,have invented certain new and useful Improvements in AutomaticGuide-Roll Attachments; and I do hereby declare the follow ing to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the acco1npa nying drawings, and to lettersor figures of reference marked thereon, which form a part of thisspecification.

This invention relates to guides, so called, by which the direction andpath of travel of a continuously-traveling endless band or apron areregulated and controlled. This guidebelongs to that class termedautomatic, since any great deviation in the band from its proper path oftravel causes activity in its mechan-.

ism to oppositely shift the position of the guide-roll, and thus theband is caused to return and resume its normal path. Hence it will beseen that the band controls its own path of travel.

The essential feature in this automatic guide consists in journaling theguide-roll at one end upon a carriage mounted upon a sleeve-shaft whichis disposed above a screw-shaft. Rota tions of the guide-rollcommunicate continuous rocking motion to a shaft furnished with pawls,while the activity of the latter is dependent upon the position of thecontinuouslytraveling endless band. The lower part of the carriagecontains a nut, which engages the screw-shaft, while a toothed wheel isaffixed to one end of thelatter. Thus rotation of this toothed wheeleffected by the action of the pawls causes the nut to travel to and froupon the screw-shaft, shifts the carriage, and thereby adjusts andmaintains the guide-roll in the position required to control thedirection and path of movement of the endless band or apron to preventit diverging therefrom.

This invention may be considered an improvement upon that shown anddescribed in Letters Patent of the United States No.

339,703, and issued to myself on the 13th day of April, 1886.

The drawings accompanying this specification represent, in Figure 1, aside elevation of an automatic guide apparatus embodying my invention.Fig. 2 is an end elevation of the same. Fig. 3 is aver-tical transversesection on line or a: in Fig. 1. Fig. 4 is a part plan view of thestop-lever mechanism.

In the above drawings 1 have represented a stand, A, adapted to bebolted to the frame of a paper-making or other machine at a point wherethe guide-roll B of the endless band is to be located. This stand orbracket A supports one end of the guide-roll with its controlling andactuating mechanism, to be hereinafter described, while the opposite endof 6 said roll is journaled in a fixed bracket at the rear or back sideof the machine-frame. (Not shown.) This guide-rollis, as usual, mountedtransversely of the machine, and likewise of the path of travel of theendless band, which is shown at C.

The front stand, A, is formed with two vertical posts, (t a, whichfurnish bearings for a stationary tubular shaft, D, horizontally dis- Iposed and vertically aligned above a rotary 7 screw-threaded shaft, E,to which is affixed a y toothed wheel, F. This latter may be rotated ineither direction by means of two gravitypawls, G G, which, suspendedabove it, are at times permitted to drop,and thus engage therewith. Thusthey become alternately active or inactive, dependent upon thedivergence of the endless band. Then the latter continues in its properpath of travel, both the pawls are maintained inactive. The lateral andopposite edges of the endless band bear against and wipe twofeather-bars, b b, at the time when the felt has diverged and it isdesired to change its course of travel. These feather-bars are adjustably secured upon an arm, 0, which extends across the machine andbeneath the felt or endless band. (See Fig. 2.) This arm is connectedwith a rocking plate, H, pivotally disposed in and surmounting the posta. Said plate is furthermore vertically aligned above 9 5 the toothedwheel, and is constructed with two oppositely-disposed lateral arms, (Id, which interconnect with the extremities of the pawls, preferably bychains, to permit said pawls to drop readily and engage the toothedwheel upon rocking of the plate H. A counterbalance-weight, I, is alsoattachedto this plate and hangs below its pivot, to render the return ofthe plate to a normal position more positive, and thus hold and retainboth pawls inactive so long as the felt continues in its normal path ofmovement. These pawls G G, above mentioned, are loosely hung upon ahub,s, securely affixed at the extremity of a shaft, e, preferablyrectangular in cross-section, which is located within the sleeve-shaft Dand adapted to oscillate in order to actuate the active pawl and shiftthe position of the toothed wheel. The mechanism for effecting theoscillation of the shaft e is arranged as follows: At the end of thejournal f of the guide-roll B is attached a face-plate, 9, provided witha crank-rod, J. The lower extremity of the latter is connected with across-head, K, sliding in a boss, L, cast on acarriage, M, which ismounted and reciprocates on the shaft-D, slotted at t. This carriagecarries the adj ustable journal of the roll, and is formed with an upperand lower hub and an interconnecting webpiece. The upper hub is slottedat h, while the lower one is adapted to receive ascrew-threaded nut, t.The latter is firmly attached to the carriage and engages thescrew-shaft E.

As before premised, constant rotation of the guide-roll by means of theendless band C actuates the crank-rod J and cross-head K,which, throughinterconnecting mechanism, produces continuous rocking of thepawlcarrying shaft 6. This mechanism consists of a connectingrod, N,which is secured at its lower end in a slot, 00, formed in thecross-head, while its upper end is attached to the extremity of aleverarm, j, extending from a hub, P, which is capable of endwise travelthereon with the carriage, as occasion requires. The slot-s h t,provided, respectively, in the upper hub of the carriage M and thesleeve-shaft D, are to permit reciprocations of the lever-army. The slot2. performs the further office in permitting endwise travel of the arm jupon the shaft 0, as be fore explained.

A safety attachment to control excessive travel endwise of the slidingcarriage in either direction is further employed, and consists of a rod,Q, provided with adjustable hubs k 10 and supported in the posts a a.This rod is aligned in the path of travel of the carriage and passesloosely through the latter. Thus when said carriage has advanced to theextreme limit of travel desired it shrugs the rod Q by means of the hubsendwise a short distance. This actuates a rod, R, which is pivotallyunited with it. The rod R is furthermore swung in a bracket on the posta, and is furnished at each end with lugs m m, having inclined faceswhich engage similar but oppositely-disposed lugs, n n, on the rear sideof I and rendered inactive.

the pawls. Hence, presuming the carriage has been advanced by therotations of the screwshaft E until it contacts with the lug 7c, the rodQ is shrugged endwise in direction of arrow 1, while the lug m isadvanced to engage the lug n on the pawl G, which is now raised Reversemovement of the carriage to the other extreme similarly thrusts the lugm against the pawl-lug n, to render the pawl G inactive. Thus excessivetravel of the sliding carriage M in either direction is prevented and.injury to the several parts of the apparatus avoided, which would beliable to happen were not means taken to control and render the pawlsinactive when desired.

The operation of this guide mechanism is as follows: Presuming theendless band is traveling continuously in the course indicated by arrow3, but trending in the direction of arrow 2 or against the feather-barb, the continuous rotations of the guide-roll B actuate the crankrod Jby means of the face-plate on its journal f and reciprocate thecross-head, Whichin' turn communicates, bymeans of the rod N andlever-arm j, oscillating motion to the pawlshaft e; hence it will bereadily observed that the latter is continuously active, while the pawlsengage the toothed wheel F only when the endless band bears against oneof the feather-bars b b. I

In the present instance the bar I; is the one employed,.and the rod 0and rocking plate H are tilted upward, permitting the pawl G to dropuntil it rests upon the wheel F. The latter is now advanced indirectionof arrow 4, (see Fig. 2,) while the shaft E is rotated. By this lattermotion the sleeve-nut z, secured to the carriage M, is compelled toadvance in direction of arrow 6, and carries with it the carriage,whichslides on the tubular shaft 1) in conformity with the endwise travel ofthe nut on its actuatingshaft. sition of the axis of the guide-roll andcauses the divergence of the endless band to be reversed.

Oonverse trend of the endless band will produce pressure against theopposite bar, I), depress the bar 0, and lower the pawl G, which willnow engage the wheel F and reverse the movement of the carriage with theguide-roll j ournal f. The counterbalance weight I causes both pawls tobe held in a state of idleness as soon as the pressure from the endlessband on the feather-bars is removed. c

When the carriage has reached the extreme point desired in the act ofadjusting the guideroll, the carriage M shrugs the rod Q, and the pawlthen active is at once reduced to a state of inactivity,when thecarriage is stopped.

I claim- 1. The combination, with a continuouslytraveling guide-rollprovided with a fixed and movable j ournal,the carriage in which themovable journal is mounted, and the hollow slotted shaft on which saidcarriage travels, of the This changes the popawl-carrying rod withinsaid shaft and continuously oscillated by the guide-roll to shift thelatter axially, substantially as set forth.

2. The combination, with a guide-roll and the endless bandtravelingthereomof the frame with the hollow fixed slotted shaft and the1'0- tating screw-shaft, said shafts being interconnected by a slidingcarriage, which is actuated at intervals of time by the guide-roll,caused by divergence laterally of said band, substantially as stated.

8. In combination with the guide-roll, the crank-rod, cross-head, andlever-arm operated thereby to oscillate the pawl-shaft, the rockin ggravity-plate with its featherbars actively induced by a continuouslytraveling band,and the screw-shaft rotated by pawls to move thejournal-carriage of the guide-roll, as and for purposes hereindescribed.

4. The endless band C, disposed between the feather-bars b b,thetiltinglever c, and the gravity-plate H, actuated by the latter, incombination with the pawls G G, mounted on the continuously-oscillatingshaft 6 and cooperating with the toothed wheel Fand screw shaft E tomove the carriage M and axially shift the guideroll, substantially asdescribed.

5. In mechanism for controlling the path of travel of an endless belt,the guide-roll B, its journal-carriage M,supporting tubular shaftD, andactuating pawls G G, with lugs a a, combined with the movable rod Q,adapted to be shrugged by the carriage, and the pivotal rod It, with itslugs m m, adapted to engage the pawls singly, as and for purposes hereinset forth.

6. The combination, with the slotted sleeveshaft D, the screw-shaft F,and the carriage M, reciprocating thereon, of the lever-arm j,with itshub P, movable endwise upon the shaft 6 within the sleeve D, said shaftbeing connected with and rocked by the guide-roll, its rod J, anderosshead K, substantially as stated.

In testimony whereof I affix my signature in presence of two witnesses.

RICHARD SMITH.

Vitnesses:

H. E. LODGE, F. (loans.

